Figure 5 - full size

 

Figure 5.
Figure 5 2F[obs] - F[calc] [A]-weighted electron-density map showing the hydrogen-bonding networks of the two conformations of His61 in A. variabilis chains A (left) and C (right). The higher occupied (occupancy 0.55 in chain A and 0.65 in chain C) conformations are shown in green (C-atom colour) and the lower occupied (0.45 in chain A and 0.35 in chain C) are shown in light blue. This figure was produced using PyMOL (DeLano, 2002[DeLano, W. L. (2002). The PyMOL Molecular Visualization System. DeLano Scientific, San Carlos, CA, USA. http://www.pymol.org .]).

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2006, 62, 1022-1029) copyright 2006.